test: add HTTP smoke tests for public-packages API (anti-regression for nginx proxy)

The admin.moicen.com nginx must proxy /api/v1/clazz/ to htykc:3002.
Without it, the API returns SPA index.html instead of JSON, causing
"接口返回了页面而非 JSON" errors in the frontend.

Tests verify:
- public-packages API returns Content-Type: application/json
- Response body has valid structure with package fields

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

tests/smoke-http.spec.ts

@@ -10,6 +10,8 @@ function frontBaseUrl(): string {
 /**
  * 不依赖浏览器：验证网关返回 H5 入口文档（部署/ DNS / TLS / Nginx 全链路底线）。
  */
+const testOrgId = '57753e11dff343b1ab95623933e8960b';
+
 test.describe('网关与 H5 文档（request）', () => {
   test('GET / 返回 HTML', async ({ request }) => {
     const res = await request.get(`${frontBaseUrl()}/`);
@@ -18,3 +20,42 @@ test.describe('网关与 H5 文档（request）', () => {
     expect(ct).toMatch(/text\/html/i);
   });
 });
+
+test.describe('课包商店 API（反代验收）', () => {
+  const kcBase =
+    process.env.KC_BASE_URL?.trim() || 'https://admin.moicen.com';
+
+  test('public-packages API 返回 JSON（非 HTML）', async ({ request }) => {
+    const url = `${kcBase}/api/v1/clazz/course-package/public-packages?org_id=${testOrgId}&page=1&page_size=20`;
+    const res = await request.get(url);
+    expect(res.ok(), `HTTP ${res.status()} ${res.statusText()}`).toBeTruthy();
+
+    const ct = res.headers()['content-type'] ?? '';
+    expect(ct).toMatch(/application\/json/i);
+
+    const body = await res.json();
+    expect(body).toHaveProperty('r');
+    expect(body.r).toBe(true);
+    expect(body).toHaveProperty('d');
+    expect(Array.isArray(body.d?.[0])).toBe(true);
+  });
+
+  test('public-packages API 含课包卡片字段', async ({ request }) => {
+    const url = `${kcBase}/api/v1/clazz/course-package/public-packages?org_id=${testOrgId}&page=1&page_size=20`;
+    const res = await request.get(url);
+    expect(res.ok()).toBeTruthy();
+
+    const body = await res.json();
+    const packages = body.d?.[0] as Array<Record<string, unknown>>;
+    expect(packages.length).toBeGreaterThan(0);
+
+    for (const pkg of packages) {
+      expect(pkg).toHaveProperty('package_name');
+      expect(pkg).toHaveProperty('total_lessons');
+      expect(pkg).toHaveProperty('package_status');
+      // Pricing fields should exist in data but not displayed in frontend
+      expect(pkg).toHaveProperty('original_price');
+      expect(pkg).toHaveProperty('selling_price');
+    }
+  });
+});